Tetanus Toxoid Reactive Lymphadenopathy Masquerading as T-Cell Lymphoma

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Abstract
We report a case in which a patient with persistent reactive lymphadenopathy post-tetanus toxoid vaccination was initially diagnosed as having T-cell lymphoma/leukemia. A florid CD4+ T-cell proliferation and pathology interpretation, in the absence of complete clinical information, that these cells co-expressed CD8 led to the initial diagnosis. Better integration of the clinical and pathologic data may have led more rapidly to the final diagnosis. Postvaccination responses can mimic lymphoma.

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